Wild Fyre
Stern Electronics, 1978You're currently viewing posts by Pinsider barakandl.
Click here to go back to viewing the entire thread.
Quoted from KenLayton:On connector J4 pin 7 of the mpu board is the flipper disable/enable signal. Commonly corroded from battery damage and can cause nagging intermittent flipper enable problems.
yep, this! super common reason for no flippers and what I was going to post about.
Driver board is commonly a single sided PCB with no plated holes which seems to get cracked solder joints faster. The flipper enable goes to driver J4, so check there too.
Quoted from Michaelxwhite:Check j4 on driver as well, any idea what pin?
Not sure off hand but will be same wire color as mpu j4 pin ken listed above. You can also check out the wiring diagram page in the manual. It will show where the connections go.
Give the solder joints on the driver board and mpu a good visual inspection. You can usually see when they are cracked.
Since it's intermittent some gentle flexing of the connectors while in play mode to see if the relay clicks may narrow down where the problem is.
You're currently viewing posts by Pinsider barakandl.
Click here to go back to viewing the entire thread.
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/early-stern-no-flippers?tu=barakandl and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.
Westminster, MA